clark



(No Model.)

2 sheetssheet 1.

G.- A. CLARK.

GOKING FURNACE.

Patented Mar. 12

N PETERS. Pheto-Lnhugnphur, wmm mn. n. c.

(No Model.) 2 Sheets--Sheet 2. V

G. A. CLARK.

001mm FURNACE.

N0. 399 379. Patented Mar. 12 1889 YEN UNTTED STATES PATENT OFFICE.

GATES A. CLARK, OF ROCHESTER, NEW YORK, ASSIGNOR TO CLARKS COKING AND SHOKELESS FURNACE COMPANY, OF SAME PLACE.

COKlNG-FURNACE.

SPECIFICATION forming part of Letters Patent No. 399,379, dated March 12, 1889.

Application filed November 23, 1888- $erial No. 291,663. (No model.)

To all whom it may concern.-

Be it known that I, GATES A, CLARK, of Rochester, county of Monroe, State of New York, have invented an Improvement in Coking-Furnaces, of which the following descrip tion, in connection with the accompanying drawings,is a specification, like letters on the drawings representing like parts.

This invention relates to coking-furnaces of that class in which soft or bituminous coal or wood or other carbonaceous material is coked and the volatile products driven off by heat caused to pass up through the tirebed to assist in combustion, and to obtain a maximum amount of heat from a minimum quantity of coal or other material.

My present invention is an improvement 5 upon the col; lug-furnace shown and described in another application, Serial No. 287,078, filed by me October 3, 1888, and has for its object to simplify the construction of the furnace, as will be described, whereby increased surface at the center of the furnace maybe olftained,

my improvements being capable of beingreadily applied at a minimum cost to furnaces of ordinary construction, such now commonly used.

My invei'ition in cokbig-furnaces therefore consists in the combination, with the walls of the furnace and the walls forming the side walls of a coking-oven within said furnace, of a bridge-wall provided with a passage communicz'iting with the tire-box below the grate, the said bridge-wall forming, with a wall of the furnace, an exit-flue for the coking-oven comn'iunicating with the passage in the bri d wall, substantially as will be described.

Other features of my invention will be pointed out in the claims at the end of this specification.

Figure l in section and elevation reprefurnace.

of brick or other suitable material and containing the boiler A, may be of any usual construction, substantially such as shown in the application referred to.

The furnace is provided two coking-ovens, ('I, only shown in Fig. 1.

Each coking-oven o is separated from the main combustion-chamber a by side walls, a a ,substantially in line with each other and extended from the front toward the rear of the furnace, the said walls being built into the bridge-wall a and the rear wall, a", of the furnace, the top of the said coking-oven being formed, as herein shown,b v the arch a, also at its sides with one of which is built into the rear wall, (1. The bridge-wall 0 extends transversely across the furnace, and

l the portion of the said wall marked 2 in Fig. 1

forms with the rear wall, ufla downwardly-ex' tended flue,a"". (See Fig. 2.) The central portion of the bridge-wall o between the cokingovens forms with the rear wall, a", a similar flu e,d, (see Fig. 3,) which is partially separated from the flue (1 by the side wall oi the said flues communicating near the bottom of the The side walls (1 as herein shown,

support the grate-bars I; of the main combusl tion-chamber or fire-box, the said gratc bars haying below them the usual ash-pit, b.

sents a sufficient portion. of a coking-furimce 1 be had to the combustion-chamber a and the embodying my invention to enable it to be understood; Fig. 2, a longitudinal section through one of the coking-(wens on the line 1/1], Fig. 1, said. figure being broken out to save space in the drawings; and Fig. 3, a loin gitudinal section through the center of the furnace on line 5c, the boiler being shown in elevation.

The furnace A, having its walls composed The bridge-wall (1 below the grate-bars l) is provided with an opening, 71", (see Fig. 1,) by which the flue a is connected to the ash-pit Z), the opening if being provided, as herein shown, with a roof, shown as an arch, but which may be a slab or plate of brick or other refractory material Each coking-oven u, as herein shown, is provided with inclined grate-bars if, having one end supported bythe rail 1), resting upon the wall a.

v The front wall of the furnace is provided with usual doors, Zr Z), by which access may coking-oven (1, respectively, and the said wall is also provided with doors 7)" h by which access may be had to the ash-pit I) and the other analogous material to be eoked is deposited upon the grate-bars Zr through the door W, and the said material is coked by the front end of the furnace a considerable distance, so that the volatile products are caused to pass up through the fire-bed nearthe front of the furnace as well as at the rear of the furnace.

In order that my improved furnace maybe employed for coking soft coal containing metallic deposits-such, for instance, as iron pyrites.-I have provided a disengaging device, herein shown as a shaft or rod, d, suitably journaled below the grate-bars b and provided, preferably, with a number of fingers,

grate-bars and disengage or detach any metal clinker accumulating on the grate-bars.

In practice the fingers d will be located on the shaft so as to pass up between every three or four grate-bars, as desired.

The shaft d may be turned by a suitable key, a (indicated by dotted lines in Fig. 1,)

from outside the furnace, thereby obviating the opening of the door to the coking-oven for purpose of poking the material being coked. The disengaging device also acts as a feeder to feed the material from the cokingoven into the combustion-chamber.

My improved coking-ovens may be readily applied to furnaces of ordinary construction, such as now commonly built, without extensive repairing and at a minimum cost.

I claim- 1. In a coking-furnace, the combination, with the walls of the furnace and the walls a (i forming the side walls of a coking-oven within said furnace, of a bridge-wall, a pro vided with a passage communicating with the fire-box below the grate, the said bridgewall forming with a wall of the furnace an exit-flue for the coking-oven communicating with the passage in the'bridge-wall, substantially as described.

2. In a coking-furnace, the combination, with the walls of the furnace and the walls a a forming the side walls of a coking-oven within said furnace, of a bridge-wall, a, pro- I vided with a passage communicating with the d, of sufficient length to pass up through the fire-box below the grate, and a roof for said passage extended into the ashpit, the said bridge-wall forming with a wall of the furnace an exit-flue for the coking-oven communicating with the passage in the bridge-wall, substantially as described.

In testimony whereof I hav esi gn ed my name to this specification in the presence of two subscribing witnesses.

GA'IES A. CLARK.

\V itn (-sses:

Z. L. DAVIS, WM. 13. VAIL. 

